Rubber sheathing and method of applying same



'July 30, 1940. R. H. KITTNER m- A1.

2.209403 RUBBER SHEATHING AND METHOD OF APPLYING SAME Filed April 22. 1939 Patented July so, 1940 UNITED STATES PATENT [OFFICE RUBBER snEA'rmNG AND METHOD OF APPLYING SAME Robert H. Kittner, Shaker Heights, and Kenneth The invention relates J. Durant, Akron, Hard Rubber Oompan corporation of New York hio,

assignors to American y, New York, N. Y., a

Application April 22, 1939, Serial No. 269,530

6 Claims.

to an improvement in plastic compound sheathings for lining or covering the and other structures it is,

surface of walls, receptacles, chutes desired to protect 6 or insulate by a layer or coating of hard or soft plastic co mpound. The plastic compound may bevulcanizable hard and .soft rubber compositions, vulcanizable synthetic rubbercompounds,

and other especially action. The invention is suitable plastic compounds which are. adapted for resisting abrasion or acid of general application,

but for the sake of simplicity of illustration and description, it will in the present disclosure be restricted of the su to the lining H with plastic compound pporting wall or walls of receptacles,

such as tumbling barrels or boxes, it being understood that the described application is illustrative only and not limitative.

The application of a er of either hard or so compound to a supportin either as the coveri protective coating or layft rubber or other plastic g'wall or other surface, tank" or receptacle, or usually effected at the the lining of a ng of a chute, is

'manufactory where the structure is made. 0c-

casionally ceptacle or other structure the plastic compound lining ofa rewill outlast the structure itself, whether it is composed of metal, wood or other material. Frequently, however, it has been found necessary to renew plastic compound linings of such or replace the receptacles or structures as tumbling barrels or'chutes used for the treatment or the conveyance of abrasive substances, such as minerals and coal tures are applied 9.

These strucal to which is, vulcanized soft usually composed of met coating or lining of rubber or similar plastic compound. In the course of time the abrasion of the protective coating by the substances impinging against it, destroys its usefulness before the metallic support is worn out. It is then necessary to send the structure backto the manufactory for the replacement of the protective coating or lining of rubber or other plastic compound. This is an expensive proceeding, it is time consuming and'also takes the piece erable period.

of apparatus out. of use for a consid- It is the object of the present invention to remed of rubber whether used as a linin y this difliculty by providing a novel form or other plastic compound sheathing, g or as a coating, and a novel method of applying the sheathing to the structure the struct returning so that the necessary repairs can be ure back to the manufactory and then it to the plant where it is to be used.

plastic compound sheathin -with the elastic stud To thisend the invention consists in the improved plasticcompound sheathing and method of applying it fully described hereinafter and particularly pointed out in the appended claims.

'In the accompanying drawing, there is shown 5 for the purpose of illustrating the invention the application of the improved plastic compound sheathing to the interior of a tumbling barrel. Fig. 1 is a transverse section through a portion of atumbling barrel, showing the application of the plastic compound sheathing or lining thereto; Figs. 2 to 6 illustrate the progressive steps of one form or method of applying the improved plastic compound sheathing to a supporting wall or other surface; Fig. '7 is a detail section showing a butt. and lap joint suitable for use in a receptacle for containing liquid; Fig.' 8 is a detail view showing a modified form "of anchoring the plastic compound sheathing to the supporting wall; and Figs. 9, 10 and 11 are detail views of another modified form of locking means for. securing the plastic compound sheathing to the .supporting wall and indicating the method of application.

In order' thatthe plastic-compound sheathed structure, the protective sheathing or coating of which has been destroyed by use, may be relined or recoated in situ without the necessity of shipping it back to the manufactory, we prepare the g in sheets of convenwhich may bein hard vulcanized hard or soft ient area and thickness or soft condition, such as rubber. The structure to be relined or recovered by the sheathing will be provided with a series of spaced holes penetrating the wall or walls of 85 the structure, and one surface of the sheets or plates of plastic compound will be provided with projecting studs or rivets in soft or elastic condition and preferably integral with the sheets or plates. These studs or rivets are spaced apart 4o correspondingly to the spacing of the holes in the wall or structure, one surface of which is to be covered or lined with a plastic compound sheathing. The sheet of plastic compound having been applied to thevsurface to be covered,

s projecting through the holes, the studs are axially elongated and looking means applied on the projecting ends. In the form of the invention shown in Figs. 1 to '6. a washer of solid hard material, such as hard rubber, having a hole'of less diameter than the studs in their normal condition, is slipped over each elongated stud and pressed against theoiiter surface of the wall, the other surface sheathing. 5s v The elongated stud is then released so as to permit the elastic material to resume its normal diameter both in the hole in the wall and at its projecting outer end, which extends beyond the outer surface of the washer. The hole in the washer being of less diameter than that of the stud in its normal condition, the washer will thus be held firmly against the outer surface of the wall, and the plastic compound sheathing will be anchored orheld firmly in place lining the receptacle or coating the supporting structure. Figs. 8 to 11 indicate modified forms of securing the plastic compound sheathing in place.

The structure shown in Fig. 1 is a portion of a tumbling barrel I0 which originally was lined with a plastic compound sheathing at the manufact'ory, and which has been relined according to the principle of the present inventionwithout shipping the tumbling barrel back to the manufactory. The novel plastic compound lining or sheathing is made in section of convenient size or area, and may be of any preferred thickness. The surface of each sheet I I of plastic compound facing or exposed to the interior of the receptacle is plane and smooth and the other surface is provided at regular intervals with soft or elastic studs or rivets I2 which are preferably formed integrally with the sheets II whether the latter are composed of vulcanized hard or soft plastic compound, such as vulcanized hard or soft rubber. -It will be understood that each receptacle or other surface to be relined or resheathed with the novel sheathing is provided with spaced holes I4 corresponding in number and arrangement to the studs or rivets I2. The studs I2 are somewhat longer than the thickness of the supporting wall or other structure I0.

The sheets or lining sections II of plastic compound are held in position on the wall III, in the form of .the invention shown in Figs, 1 to 6, by

each washer firmly in position against the outer surface of the wall I0 and thereby anchor the sheets II in place on the other surface of the wall I0, the outer end of each stud I2 is tapered, as indicated at I8,'to a point somewhat less in diameter than the diameter of the hole I6 in each washer I5 in order that the washer may be slipped over the tapered end I 8 of the stud and leave the outer end of each stud projecting a short distance beyond the outer surface of the washer I5, as indicated at I9 in Fig. 3. To elongate each stud I2 to a diameter less than the diameter of the hole It in each washer I5, so that the washer may be slipped over the elongated stud and pressed into engagement with the outer surface I! of the wall I0, the outer end I9 of each stud may conveniently be grasped by a pair of pliers 20 and pulled outwardly, as shown in Figs. 4 and 5. When the stud is'released it not only contracts axially but also expands radially to its normal diameter, except at the point '22 which is surrounded by the Washer 15, as indicated in Fig. 6, in which figure the base or inner end of the stud is shown occupying the hole I! and the outer end IQ of the stud forms a head 25 pressing inwardly against the outer surface of the washer I5, thereby holding the lining or sheathing II against the inner surface of the wall II).

It is sometimes convenient to employ other methods of locking the outer ends of the studs I2 against the outer surface I! of the supporting wall to anchor the sheathing l2 against the other surface of the wall. In the modification shown may be about that of the hole I4. This stud is provided with a transverse pin-receiving hole 33 at a point distant from the base of the stud less than the thickness of the wall III, as shown in Fig.9. To lock the stud 38 against the outer surface I1 of the supporting wall II] it is simply necessary to elongate the stud 38 by pulling outwardly on its outer end, as indicated in Fig. 10, until the hole 39 is beyond the outer surface I! of the wall I0. Thereupon a pin 40 is slipped through the hole 39 and the outer end of the stud 38 released, whereupon the stud 38 contracts axially and the pin 40 is firmly locked against the outer surface I! of the wall ID, as indicated in Fig. 11, to anchor the sheathing II against the other surface of the wall. Still other forms of lockingmeans may be employed to keep the studs in stretched condition and thereby firmly hold the sheathing against the supporting wall.

Since the novel form of plastic compound lining or sheathing for the walls of receptacles or other surfaces made in sections, are usually smaller than the surface to be covered, a plurality of sections will be employed to cover a surface, requiring the formation of a joint between adjacent sections. These joints,may be formed in any. convenientway either as a skived joint. indicatedv generally at 2T in Fig. 1, or as 'a butt and lap joint,.as shown in Fig. 7. The skived joint shown in Fig; 1 is suitable-for a tumbling barrel or a chute in which the direction of flow of the materials being treated is indicated by the arrow. The oblique end of thelining sections are spaced slightly apart and the opening between them is filled with cement 30. The butt and lap jointshown'in Fig. '7 is suitable for use in tanks adapted to contain liquids. The adjacent ends of two sections of lining are. indicated at 3| and 32 and the space between them is filled with cement 33 and the joint thus formed is covered by a thin strip of plastic compound 34 which is secured to the'inner surfaces of the lining sections 3I and 32 by an interposed layer of cement 35.

- Having thus described the invention, what we claim as new is:

1. A structure comprising a supporting wall having a plurality of spaced holes therethrough, a sheathing applied to one surface of the wall and having a plurality of elastic studs extending therefrom longer than the thickness of the wall and inserted in the holes of the wall with their ends projecting beyond the other surface of the wall, a portion of the studs being in stretched condition and locking means attached tothe projecting ends of the studs to hold the sheathing firmly against the wall.

2. The method'of protecting one surface of a wall having a hole therethrough which consists in applying to the said surface of the wall a sheet of material having an elastic stud extending from' one surface thereof longer than the thickness of apoaaos 3 the wall so that the end of the stud will project beyond the other surface of the wall, stretching the stud axially, applying locking means to the projecting end of the stud and then releasing 5 the stud so that the contraction thereof will bring the locking means firmly against the second surface of the wall so as to anchor the sheathing against the first surface of the wall.

3. A structure comprising a supporting wall having a plurality of spaced holes therethrough, a rubber sheathing applied to one surface of the wall and having a plurality of stretched soft rubber studs extending from one surface thereof longer than the thickness of the walland inserted in the holes in the wall with their outer ends projecting beyond the other surface of the wall, and a hard-material washer placed on the projecting end of each soft rubber stud and having a hole therein smaller than the diameter of go the stud in its normal condition to hold the rubber sheathing against the first surface of the wall.

4. A structure comprising a supporting wall having a hole therethrough, a sheet of vulcan- 25 ized rubber applied to one surface of the wall and having a soft rubber stud longer than thethickness of the wall projecting through the hole, a portion of said stud being in stretched condition and its outer end in substantially normal 30 condition, and a washer of solid material having a hole therein of less diameter than the normal thickness of the stud placed on the stretched part of the projecting end of the stud and being held against the outer surface of the wall by 35 the outer end of the stud.

5. The method of securing a vulcanized rubber sheathingagainstonesurfaceofasupportingwall having a plurality of holes therethrough, which consistsinapplylngtosaidsurfaceofthewalla rubber sheathing having a plurality of elastic studs corresponding to the holes and extending 5 from one surface thereof longer than the thickness of the wall so that the studs will be received in the corresponding holes with their outer ends projecting beyond the other surface of the wall, stretching the studs outwardly from the wall, 10 placing over each stretched stud and against the second surface of the wall a washer having a hole therein smaller in diameter than the diameter of the stud in its normal condition and releasing theendofthestudsoastopermitittoexpand l5 laterally and thereby engage with the outer surface of the washer to hold it against the wall.

6. The method of securing a rubber lining to one surface of a supporting wall having a hole therethrough, which consists in applying to said surface of the wall a sheet of vulcanized rubber lining having an elastic stud extending from one surface thereof longer than the thickness of the wall so that the end of the stud will project beyond the other surface of the wall. stretching the stud axially, placing over the stretched stud and against the outer surface of the wall a washer having a hole therein smaller than the diameter of the stud in normal condition and then releasing the stud so that the outer end thereof will resume its normal condition and hold the washer against the second surface of the wall.

ROBERT H. mm. KENNETH J. DUB-ANT. 

